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Key Features
- Variable Neutral Density
- Optical Glass Construction
- Rotating Aluminum Filter Ring
- 43mm Front Filter Thread
This 1- to 9-stop, Variable Fader ND2-ND400 Filter from K&F Concept is a 40.5mm filter providing an adjustable light reduction of 1 to 9 stops. It darkens the entire image evenly, allowing a photograph to be made with a wider aperture or slower shutter speed without overexposing your image. By slowing the exposure time or increasing the aperture, it is possible to control the depth of field and blur movement, creating a dynamic look for streams, waterfalls, landscapes, and more.
More DetailsSee any errors on this page?
What is the frequency response of the K&F Concept ...
What is the frequency response of the K&F Concept Variable Fader ND2-ND400 Filter (40.5mm)?
Unfortunately, the specs of the K&F Concept Variable Fader ND2-ND400 Filter (40.5mm) do not list frequency response. The specs we do have is that if you turn the filter you can change the density of the filter from 1 to 8.6 stops.
Date published: 2024-07-18
Does the 40.5mm fit into the rear drop-in caddy ...
Does the 40.5mm fit into the rear drop-in caddy of a sony telephoto lens (300mm 2.8)?
The K&F Concept Variable Fader ND Filter (40.5mm, 1 to 9 Stops) as well as any other variable ND will not fit into the drop in holder of the Sony 300mm f2.8 lens. The only option would be to use a solid ND with that lens.
Date published: 2025-03-06
Are they hard stops?
Are they hard stops?
My 72mm B-ND2-400 [KF01.1112] does not have hard stops at the ends, or click stops at each marking.
Date published: 2024-03-28
Will my lens cap fit on this filter? The lens is ...
Will my lens cap fit on this filter? The lens is a Lumix 12-35 micro 4/3.
The front thread for this K&F Concept Variable Fader ND2-ND400 Filter (58mm) would actually be 62mm, so your current cap will not fit.
Date published: 2022-10-27
Does it work in continuous autofocus mode of sony ...
Does it work in continuous autofocus mode of sony cameras with the Sony FE 28 mm f/2 Lens?
If the filter is set to the darker end, that may interfere with the continuous autofocus.
Date published: 2021-04-06
Can you please confirm this will fit on the ...
Can you please confirm this will fit on the Tamron 17-28 f/2.8 Di III RXD lens. Will the 72mm front thread accept a 2nd filter?
The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E has 67mm front focus threads. As such, the K&F Concept Variable Fader ND2-ND400 Filter (67mm) would be compatible to fit the front filter threads on the Tamron 17-28mm lens. A 72mm filter would not directly fit on the front of the Tamron 17-28mm lens without the use of a step-up ring such as the Sensei 67-72mm Aluminum Step-Up Ring, B&H # SESUR6772.
Date published: 2023-04-02
What size slip-on cap fits the 77mm size? Spec ...
What size slip-on cap fits the 77mm size? Spec says front is 82mm; only push on is Kaiser 82 & people say it it's not a 82mm.
@Dan W: does the Sensei snap on require a thread to attach to? Because this variable ND has no externally facing thread, as far as I know. That is why other Q&As point to needing a slip-on cap.
Date published: 2024-06-05
Would this fit a 12mm samyang lens?
Would this fit a 12mm samyang lens?
The K&F Concept Variable Fader ND2-ND400 Filter (67mm) BH #KFVFND240067 fits lenses with a front thread of 67mm. I am not seeing we currently sell a 12mm Samyang with that thread size. You will want to double check your lens to see what the front thread size is. You did not list the full name for us to check.
Date published: 2023-08-05